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Recent questions tagged vector-analysis
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1
GATE ECE 2021 | Question: 1
The vector function $F\left ( r \right )=-x\hat{i}+y\hat{j}$ is defined over a circular arc $C$ shown in the figure. The line integral of $\int _{C} F\left ( r \right ).dr$ is $\frac{1}{2}$ $\frac{1}{4}$ $\frac{1}{6}$ $\frac{1}{3}$
Arjun
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Vector Analysis
Feb 20, 2021
by
Arjun
4.5k
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184
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gateec-2021
vector-analysis
vector-in-planes
0
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0
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2
GATE ECE 2021 | Question: 16
If the vectors $(1.0,\:-1.0,\:2.0)$, $(7.0,\:3.0,\:x)$ and $(2.0,\:3.0,\:1.0)$ in $\mathbb{R}^{3}$ are linearly dependent, the value of $x$ is __________
Arjun
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in
Vector Analysis
Feb 20, 2021
by
Arjun
4.5k
points
107
views
gateec-2021
numerical-answers
vector-analysis
vector-in-planes
0
votes
0
answers
3
GATE ECE 2021 | Question: 17
Consider the vector field $F\:=\:a_{x}\left ( 4y-c_{1}z \right )+a_y\left ( 4x + 2z\right )+a_{z}\left ( 2y +z\right )$ in a rectangular coordinate system $(x,y,z)$ with unit vectors $a_{x},\:a_{y}$ and $a_{z}$. If the field $F$ is irrotational (conservative), then the constant $c_{1}$ (in integer) is _________________
Arjun
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Vector Analysis
Feb 20, 2021
by
Arjun
4.5k
points
98
views
gateec-2021
numerical-answers
vector-analysis
vector-in-planes
0
votes
0
answers
4
GATE ECE 2021 | Question: 37
For a vector field $D=\rho\cos^{2}\:\varphi \:a_{\rho }+z^{2}\sin^{2}\:\varphi \:a_{\varphi }$ in a cylindrical coordinate system $\left ( \rho ,\varphi ,z \right )$ with unit vectors $a_{\rho },a_{\varphi }$ and $a_{z}$, the ... $\left ( \rho =3, 0\leq z\leq 2 \right )$ (rounded off to two decimal places) is ________________
Arjun
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Vector Analysis
Feb 20, 2021
by
Arjun
4.5k
points
43
views
gateec-2021
numerical-answers
vector-analysis
0
votes
0
answers
5
GATE ECE 2020 | Question: 1
If $v_{1},v_{2}, \dots ,v_{6}$ are six vectors in $\mathbb{R}^{4}$ , which one of the following statements is $\text{FALSE}$? It is not necessary that these vectors span $\mathbb{R}^{4}$. These vectors are not linearly independent. Any four of these vectors form a basis ... $\mathbb{R}^{4}$ , then it forms a basis for $\mathbb{R}^{4}$.
jothee
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Vector Analysis
Feb 13, 2020
by
jothee
1.9k
points
227
views
gate2020-ec
vector-analysis
1
vote
0
answers
6
GATE ECE 2020 | Question: 2
For a vector field $\overrightarrow{A}$, which one of the following is $\text{FALSE}$? $\overrightarrow{A}$ is solenoidal if $\triangledown \cdot \overrightarrow{A}=0.$ $\triangledown \times \overrightarrow{A}$ ...
jothee
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Vector Analysis
Feb 13, 2020
by
jothee
1.9k
points
228
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gate2020-ec
vector-analysis
0
votes
0
answers
7
GATE ECE 2020 | Question: 24
The random variable $Y=\int_{-\infty }^{\infty }W\left ( t \right )\phi \left ( t \right )dt, \text{ where } \phi \left ( t \right )=\begin{cases} 1; & 5\leq t\leq 7 &\\ 0; & \text{otherwise} \end{cases}$ and $W(t)$ is ... noise process with two-sided power spectral density $S_{W}\left ( f \right )=3 W/Hz$, for all $f$. The variance of $Y$ is ________.
jothee
asked
in
Vector Analysis
Feb 13, 2020
by
jothee
1.9k
points
74
views
gate2020-ec
numerical-answers
vector-analysis
gausss-theorem
1
vote
1
answer
8
GATE ECE 2016 Set 3 | Question: 27
If the vectors $e_1=(1,0,2)$, $e_2=(0,1,0)$ and $e_3=(-2,0,1)$ form an orthogonal basis of the three-dimensional real space $\mathbb{R}^3$, then the vector $\textbf{u}=(4,3,-3)\in \mathbb{R}^3 $ can be expressed as $\textbf{u}=-$ ... \frac{2}{5}$e_1+3e_2+$\large\frac{11}{5}$e_3 \\$ $\textbf{u}=-$\large\frac{2}{5}$e_1+3e_2-$\large\frac{11}{5}$e_3$
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
145
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gate2016-ec-3
vector-analysis
0
votes
0
answers
9
GATE ECE 2016 Set 3 | Question: 28
A triangle in the $xy$-plane is bounded by the straight lines $2x=3y, \: y=0$ and $x=3$. The volume above the triangle and under the plane $x+y+z=6$ is _______
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
67
views
gate2016-ec-3
numerical-answers
vector-analysis
vector-in-planes
0
votes
0
answers
10
GATE ECE 2016 Set 3 | Question: 50
A voice-grade AWGN (additive white Gaussian noise) telephone channel has a bandwidth of $4.0\:kHz$ and two-sided noise power spectral density ${\large\frac{\eta}{2}}=2.5\times10^{-5}Watt\:per\:Hz$. If information at the rate ... transmitted over this channel with arbitrarily small bit error rate, then the minimum bit-energy $E_b$ (in mJ/bit) necessary is _______
Milicevic3306
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in
Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
44
views
gate2016-ec-3
numerical-answers
vector-analysis
gauss's-theorem
0
votes
0
answers
11
GATE ECE 2016 Set 2 | Question: 5
Consider the time-varying vector $\textbf{I}=\hat{x}15\cos(\omega t)+\hat{y}5\sin(\omega t)$ in Cartesian coordinates, where $\omega> 0$ is a constant. When the vector magnitude $\mid \textbf{I} \mid$ is at its minimum value, the angle $\theta$ that $\textbf{I}$ makes with the $x$ axis (in degrees, such that $ 0\leq \theta \leq 180)$ ________
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
206
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gate2016-ec-2
numerical-answers
vector-analysis
0
votes
0
answers
12
GATE ECE 2016 Set 2 | Question: 55
A positive charge $q$ is placed at $x=0$ between two infinte metal plates placed at $x=-d$ and at $x=+d$ respectively. The metal plates lie in the $yz$ plane. The charge is at rest at $t=0$, when a voltage $+V$ is applied to the plate at $-d$ and ... that the charge $q$ takes to reach the right plate is proportional to $d/V$ $\sqrt{d}/V$ $d/\sqrt{V}$ $\sqrt{d/V}$
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
31
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gate2016-ec-2
vector-analysis
0
votes
0
answers
13
GATE ECE 2016 Set 1 | Question: 29
The region specified by $\{ (\rho,\varphi,z):3 \leq\rho\leq 5,\frac{\pi}{8}\leq\varphi\leq\frac{\pi}{4}, \: 3\leq z\leq4.5\}$ in cylindrical coordinates has volume of _________
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
49
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gate2016-ec-1
numerical-answers
vector-analysis
0
votes
0
answers
14
GATE ECE 2016 Set 1 | Question: 50
An analog pulse $s(t)$ is transmitted over an additive white Gaussian noise (AWGN) channel. The received signal is $r(t) = s(t) + n(t)$, where $n(t)$ is additive white Gaussian noise with power spectral density $\frac{N_0}{2}$. The received signal is passed ... $E_s > E_h$ ; $SNR_{max}>\frac{2E_s}{N_0} \\ $ $E_s < E_h$ ; $SNR_{max}=\frac{2E_h}{N_0}$
Milicevic3306
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in
Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
35
views
gate2016-ec-1
vector-analysis
gauss's-theorem
0
votes
0
answers
15
GATE ECE 2015 Set 3 | Question: 3
If $C$ is a circle of radius $r$ with centre $z_{0},$ in the complex $z$-plane and if $n$ is a non-zero integer, then $\oint _{C}\frac{dz}{(z-z_{0})^{n+1}}$ equals $2\pi n j$ $0$ $\frac{nj}{2\pi}$ $2\pi n$
Milicevic3306
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Complex Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
52
views
gate2015-ec-3
vector-analysis
0
votes
0
answers
16
GATE ECE 2015 Set 3 | Question: 4
Consider the function $g(t) = e^{-t}\sin(2\pi t)u(t)$ where $u(t)$ is the unit step function. The area under $g(t)$ is ______.
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
92
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gate2015-ec-3
numerical-answers
vector-analysis
0
votes
0
answers
17
GATE ECE 2015 Set 3 | Question: 29
A vector field $\textbf{D} = 2\rho^{2}\:\textbf{a}_{\rho} + z\: \textbf{a}_{z}$ exists inside a cylindrical region enclosed by the surfaces $\rho =1,z = 0$ and $z = 5.$ Let $S$ be the surface bounding this cylindrical region. The surface integral of this field on $S(∯_{S} \textbf{D.ds})$ is _______.
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
58
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gate2015-ec-3
numerical-answers
vector-analysis
0
votes
0
answers
18
GATE ECE 2015 Set 2 | Question: 49
A zero mean white Gaussian noise having power spectral density $\dfrac{N_{0}}{2}$ is passed through an LTI filter whose impulse response $h(t)$ is shown in the figure. The variance of the filtered noise at $t = 4$ is $\dfrac{3}{2}A^{2}N_{0} \\$ $\dfrac{3}{4}A^{2}N_{0} \\$ $A^{2}N_{0} \\$ $\dfrac{1}{2}A^{2}N_{0}$
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
46
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gate2015-ec-2
vector-analysis
gauss's-theorem
0
votes
0
answers
19
GATE ECE 2015 Set 1 | Question: 25
A vector $\overrightarrow{P}$ is given by $\overrightarrow{P} = x^3y\overrightarrow{a}_x - x^2y^2\overrightarrow{a}_y - x^2 yz \overrightarrow{a}_z$. Which one of the statements is TRUE? $\overrightarrow{P}$ is ... irrotational, but not solenoidal $\overrightarrow{P}$ is neither solenoidal, nor irrotational $\overrightarrow{P}$ is both solenoidal and irrotational
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
47
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gate2015-ec-1
vector-analysis
0
votes
0
answers
20
GATE ECE 2015 Set 1 | Question: 54
The electric field intensity of a plane wave traveling in free space is given by the following expression $\textbf{E}(x,t)=\textbf{a}_y \: 24 \: \pi \: \: \cos(\omega t - k_0 x) \: \: (V/m)$ ... $x+y=1$. The total time-averaged power (in mW) passing through the square area is _____________.
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
33
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gate2015-ec-1
numerical-answers
vector-analysis
0
votes
0
answers
21
GATE ECE 2015 Set 1 | Question: 55
Consider a uniform plane wave with amplitude $(E_0)$ of $10 \: V/m$ and $1.1$ GHz frequency travelling in air, and incident normally on a dielectric medium with complex relative permittivity $(\varepsilon _r)$ ... electric field component (in V/m) after it has travelled a distance of $10$ cm inside the dielectric region is ____________.
Milicevic3306
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Vector Analysis
Mar 28, 2018
by
Milicevic3306
15.8k
points
37
views
gate2015-ec-1
numerical-answers
vector-analysis
0
votes
0
answers
22
GATE ECE 2014 Set 4 | Question: 2
The magnitude of the gradient for the function $f(x,y,z) = x^2 +3y^2 +z^3$ at the point $(1,1,1)$ is ___________.
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
points
31
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gate2014-ec-4
numerical-answers
vector-analysis
gradient
0
votes
0
answers
23
GATE ECE 2014 Set 4 | Question: 3
Let $X$ be a zero mean unit variance Gaussian random variable. $E[ \mid X \mid ]$ is equal to __________
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
points
40
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gate2014-ec-4
numerical-answers
vector-analysis
gausss-theorem
random-variable
0
votes
0
answers
24
GATE ECE 2014 Set 4 | Question: 5
The directional derivative of $f(x,y)= \frac{xy}{\sqrt{2}} (x+y)$ at $(1,1)$ in the direction of the unit vector at an angle of $\frac{\pi}{4}$ with $y$-axis, is given by _________.
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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31
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gate2014-ec-4
vector-analysis
numerical-answers
0
votes
0
answers
25
GATE ECE 2014 Set 4 | Question: 22
If calls arrive at a telephone exchange such that the time of arrival of any call is independent of the time of arrival of earlier or future calls, the probability distribution function of the total number of calls in a fixed time interval will be Poisson Gaussian Exponential Gamma
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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68
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gate2014-ec-4
vector-analysis
gauss's-theorem
0
votes
0
answers
26
GATE ECE 2014 Set 4 | Question: 49
Consider a communication scheme where the binary valued signal $X$ satisfies $P\{X=+1\}=0.75$ and $P\{X=-1 \}=0.25$. The received signal $Y=X+Z$, where $Z$ is a Gaussian random variable with zero mean and variance ... $\sigma ^2$
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Vector Analysis
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Milicevic3306
15.8k
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30
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gate2014-ec-4
vector-analysis
gauss's-theorem
0
votes
0
answers
27
GATE ECE 2014 Set 4 | Question: 52
Consider a discrete-time channel $Y=X +Z$, where the additive noise $Z$ is signal-dependent. In particular, given the transmitted symbol $ X \in \{-a , +a\}$ at any instant, the noise sample $Z$ is chosen independently from a Gaussian distribution with mean $\beta X$ and unit ... $\beta = -0.3$, the BER is closest to $10^{-7}$ $10^{-6}$ $10^{-4}$ $10^{-2}$
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Milicevic3306
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gate2014-ec-4
vector-analysis
gausss-theorem
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0
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28
GATE ECE 2014 Set 4 | Question: 54
Gven $\overrightarrow{F} = z \hat{a}_x + x \hat{a}_y + y \hat{a}_z$. If $S$ represents the portion of the sphere $x^2 +y^2+z^2=1$ for $z \geq 0$, then $\int _s \nabla \times \overrightarrow{F} \cdot \overrightarrow{ds}$ is __________.
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15.8k
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78
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gate2014-ec-4
numerical-answers
vector-analysis
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0
answers
29
GATE ECE 2014 Set 3 | Question: 53
Given the vector $\textbf{A}= ( \cos x ) ( \sin y )\hat{a_{x}}+( \sin x )( \cos y )\hat{a_{y}},$ where $\hat{a_{x}},$ $\hat{a_{y}}$ denote unit vectors along $x$, $y$ directions, respectively. The magnitude of curl of $\textbf{A}$ is __________
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Vector Analysis
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Milicevic3306
15.8k
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52
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gate2014-ec-3
numerical-answers
vector-analysis
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0
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30
GATE ECE 2014 Set 2 | Question: 22
The capacity of a band-limited additive white Gaussian noise (AWGN) channel is given by $C = W \log_{2}\left ( 1+\frac{p} {\sigma ^{2}w} \right )$ bits per second (bps), where $W$ is the channel bandwidth, $P$ is the average power received ... channel capacity (in kbps) with infinite bandwidth $(W\rightarrow \infty )$ is approximately $1.44$ $1.08$ $0.72$ $0.36$
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Vector Analysis
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Milicevic3306
15.8k
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70
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gate2014-ec-2
vector-analysis
gauss's-theorem
0
votes
0
answers
31
GATE ECE 2014 Set 2 | Question: 29
If $\overrightarrow {r}= x\hat{a_{x}}+y\hat{a_{y}}+z\hat{a_{z}}$ and $\mid \overrightarrow{r} \mid= r$ , then $\text{div} ( r^{2} \nabla ( \text{ln }r ) )$ = _______ .
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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39
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gate2014-ec-2
vector-analysis
numerical-answers
0
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32
GATE ECE 2014 Set 1 | Question: 28
The volume under the surface $z(x,y) = x + y$ and above the triangle in the $x – y$ plane defined by $\{0 \leq y \leq x \: \text{and} \: 0 \leq x \leq 12\}$ is _______.
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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49
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gate2014-ec-1
numerical-answers
vector-analysis
0
votes
0
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33
GATE ECE 2014 Set 1 | Question: 46
Consider the state space model of a system, as given below ... The system is controllable and observable uncontrollable and observable uncontrollable and unobservable controllable and unobservable
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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38
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gate2014-ec-1
vector-analysis
0
votes
0
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34
GATE ECE 2014 Set 1 | Question: 53
In spherical coordinates, let $\hat{a_{\theta}},\hat{a_{\phi}}$ denote unit vectors along the $\theta,\phi$ directions. $\textbf{E} = \dfrac{100}{r}\sin\theta \cos (\omega t - \beta r)\hat{a_{\theta}}\: V/m$ ... free space. The average power $(W)$ crossing the hemispherical shell located at $r = 1\:km,0\leq \theta \leq \pi/2$ is ______.
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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61
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gate2014-ec-1
numerical-answers
vector-analysis
0
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0
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35
GATE ECE 2013 | Question: 52
A monochromatic plane wave of wavelength $\lambda = 600 \mu m$ is propagating in the direction as shown in the figure below. $\vec{E_{i}},\vec{E_{r}},$ and $\vec{E_{t}}$ ...
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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50
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gate2013-ec
vector-analysis
0
votes
0
answers
36
GATE ECE 2013 | Question: 53
A monochromatic plane wave of wavelength $\lambda = 600 \mu m$ is propagating in the direction as shown in the figure below. $\vec{E_{i}},\vec{E_{r}},$ and $\vec{E_{t}}$ ...
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Vector Analysis
Mar 26, 2018
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Milicevic3306
15.8k
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66
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gate2013-ec
vector-analysis
0
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37
GATE ECE 2013 | Question: 39
The $\text{DFT}$ of a vector $\begin{bmatrix} a & b & c & d \end{bmatrix}$ is the vector $\begin{bmatrix} \alpha & \beta & \gamma & \delta \end{bmatrix}.$ ... $\begin{bmatrix} \alpha & \beta & \gamma & \delta \end{bmatrix}$
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Vector Analysis
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Milicevic3306
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32
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gate2013-ec
vector-analysis
0
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0
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38
GATE ECE 2013 | Question: 7
The divergence of the vector field $\overrightarrow{A} = x\hat{a}_{x} + y\hat{a}_{y} + z\hat{a}_{z}$ is $0$ $1/3$ $1$ $3$
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Milicevic3306
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gate2013-ec
vector-analysis
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39
GATE ECE 2013 | Question: 2
Consider a vector field $\vec{A}(\vec{r}).$ The closed loop line integral $\displaystyle {} \int \vec{A}\bullet\vec{dl}$ can be expressed as $\displaystyle {} \iint (\triangledown \times \vec{A}) \bullet\vec{ds}$ over the closed surface ... by the loop $\displaystyle {} \iiint (\triangledown \times \vec{A}) \bullet\vec{ds}$ over the open surface bounded by the loop
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Vector Analysis
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Milicevic3306
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35
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gate2013-ec
vector-analysis
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40
GATE ECE 2012 | Question: 35
The direction of vector $A$ is radially outward from the origin, with $|A|=kr^n$ where $r^2=x^2+y^2+z^2$ and $k$ is a constant. The value of $n$ for which $\triangledown.A=0$ is $-2$ $2$ $1$ $0$
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Mar 25, 2018
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Milicevic3306
15.8k
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99
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gate2012-ec
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